# Homework 6 - yindeemark (rry82) Homework 6 chelikowsky...

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Unformatted text preview: yindeemark (rry82) Homework 6 chelikowsky (59005) 1 This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Batman, whose mass is 124 kg, is holding on to the free end of a 11 . 7 m rope, the other end of which is fixed to a tree limb above. He is able to get the rope in motion as only Batman knows how, eventually getting it to swing enough that he can reach a ledge when the rope makes a 42 . 3 angle with the vertical. The acceleration of gravity is 9 . 8 m / s 2 . How much work was done against the force of gravity in this maneuver? Answer in units of J. 002 10.0 points A force F is exerted by a broom handle on the head of the broom, which has a mass m . The handle is at an angle to the horizontal, as shown below. F What is the work done by the force on the head of the broom as it moves a distance d across a horizontal floor? 1. W = F m cos 2. W = F md sin 3. W = F m tan 4. W = F d cos 5. W = F d sin 003 10.0 points You drag a(n) 15 . 5 kg steamer trunk over a rough surface by a constant force of 162 N acting at an angle of 27 . 9 above the horizon- tal. You move the trunk over a distance of 6 . 63 m in a straight line, and the coefficient of kinetic friction is 0 . 22. The acceleration of gravity is 9 . 8 m / s 2 . 15 . 5 kg = 0 . 22 1 6 2 N 2 7 . 9 How much is the work done on the block by the net force? Answer in units of J. 004 (part 1 of 2) 10.0 points A 82 . 3 g bullet is fired from a rifle having a barrel 0 . 718 m long. Assuming the origin is placed where the bullet begins to move, the force exerted on the bullet by the expanding gas is F = a + bx- cx 2 , where a = 12600 N, b = 11900 N / m, c = 20900 N / m 2 , with x in meters....
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## This note was uploaded on 03/26/2010 for the course PHY 303K taught by Professor Turner during the Fall '08 term at University of Texas at Austin.

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Homework 6 - yindeemark (rry82) Homework 6 chelikowsky...

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